1 /*
   2  * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.javafx.tk.quantum;
  27 
  28 import com.sun.glass.ui.Pixels;
  29 import com.sun.prism.PixelSource;
  30 
  31 /**
  32  * EmbeddedState is intended to provide for a shadow copy the View/Scene state
  33  * similar to the shadow Graph, providing a static snapshot until the Scene
  34  * is rendered.  EmbeddedState captures state that is specific to embedding.
  35  */
  36 final class EmbeddedState extends SceneState {
  37 
  38     public EmbeddedState(GlassScene vs) {
  39         super(vs);
  40     }
  41 
  42     /**
  43      * Put the pixels on the screen.
  44      *
  45      * @param source - the source for the Pixels object to be uploaded
  46      */
  47     @Override
  48     public void uploadPixels(PixelSource source) {
  49         if (isValid()) {
  50             Pixels pixels = source.getLatestPixels();
  51             if (pixels != null) {
  52                 try {
  53                     EmbeddedScene escene = (EmbeddedScene) scene;
  54                     // Pixels are always stored in an IntBuffer for uploading
  55                     escene.uploadPixels(pixels);
  56                 } finally {
  57                     source.doneWithPixels(pixels);
  58                 }
  59             }
  60         } else {
  61             source.skipLatestPixels();
  62         }
  63     }
  64 
  65     /**
  66      * Drawing can occur when there is an embedded scene that has a host.
  67      *
  68      * @return true if drawing can occur; false otherwise
  69      *
  70      * May be called on any thread.
  71      */
  72     @Override
  73     public boolean isValid() {
  74         return scene != null && getWidth() > 0 && getHeight() > 0;
  75     }
  76 
  77     /** Updates the state of this object based on the current state of its
  78      * nativeWindow.
  79      *
  80      * May only be called from the event thread.
  81      */
  82     @Override
  83     public void update() {
  84         super.update();
  85         float scalex = ((EmbeddedScene) scene).getRenderScaleX();
  86         float scaley = ((EmbeddedScene) scene).getRenderScaleY();
  87         update(1.0f, 1.0f, scalex, scaley, scalex, scaley);
  88         if (scene != null) {
  89             // These variables and others from the super class need be kept up to date to
  90             // minimize rendering.  For now, claim that the embedded scene is always visible
  91             // and not minimized so that rendering can occur
  92             isWindowVisible = true;
  93             isWindowMinimized = false;
  94         }
  95     }
  96 }